From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Engine noise issues related to springs and valves, with proposed solutions for F.Z.B. and SS engines.
| Identifier | WestWitteringFiles\S\September1928-October1928\ Scan192 | |
| Date | 25th September 1928 guessed | |
| contd :- -6- siderable spring noise with the double springs being manifest by a loud 'swishing' noise at various engine speeds. This we trace to spring periods, the noise being due to the coils striking each other. We have not yet been successful in overcoming this. The present rocker mechanism cover we find considerably amplifies the valve noises. An appreciable improvement has been effected by placing felt strips under the base and spring washers under the holding-down thumb screws. This scheme applied to the F.Z.B. engines and is now on production and we recommend it should be applied to the SS.{S. Smith} engine. We hope to have the new carburetter ready in a few days. Hs{Lord Ernest Hives - Chair}/A.{Mr Adams} C. Lovesey. | ||